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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/3584

Title: Electrochemistry of 2-dimethylaminoethanethiol SAM on gold electrode: Interaction with SWCNT-poly(m-aminobenzene sulphonic acid), electric field-induced protonation-deprotonation, and surface pKa
Authors: Pillay, J
Agboola, BO
Ozoemena, KI
Keywords: Self-assembled monolayer
Protonation-deprotonation
Surface pKa
Cyclic voltammetry
Electrochemical impedance spectroscopy
Electrochemistry Communications
2-dimethylaminoethanethiol
Gold electrode
SWCNT-poly(m-aminobenzene sulphonic acid)
Electric field-induced protonation-deprotonation
Issue Date: Jun-2009
Publisher: Elsevier
Citation: Pillay, J, Agboola, BO and Ozoemena, KI. 2009. Electrochemistry of 2-dimethylaminoethanethiol SAM on gold electrode: Interaction with SWCNT-poly(m-aminobenzene sulphonic acid), electric field-induced protonation-deprotonation, and surface pKa. Electrochemistry Communications. Vol. 11(6), pp 1292 - 1296
Abstract: Electrochemical behaviour of self-assembled monolayer of 2-dimethylaminoethanethiol (DMAET) on gold electrode, with and without integration with SWCNT-poly(m-aminobenzene sulphonic acid) (SWCNT-PABS) has been probed. It is proved that the so-called electric field induced protonation-deprotonation process, hitherto observed for the -COOH terminated SAMs, is also observed for the -N(H)+(CH3)2 terminated. The surface pKa of DMAET was estimated as 7.6, smaller than its solution pKa of 10.8. It is also shown that SWCNT-PABS is irreversibly attached to the DMAET SAM.
Description: Copyright: 2009 Elsevier
URI: http://hdl.handle.net/10204/3584
ISSN: 1388-2481
Appears in Collections:Nanotechnology
Analytical science
General science, engineering & technology

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